There are some camera difficulties, but they're infrequent and hardly major. The difficulty is pure; there is no "cheap" in this game and there is no luck, it's all fair play and it's all beatable by calculation and reaction. NG2 is the perfect fighting-action game, it is the ultimate gaming challenge for 2008, and it's one of the best looking 'gore games' ever created.
If you want to know why Master Ninja level NG players give no respect to anyone who hasn't achieved this level of action-gaming perfection, you must become one yourself.